Concrete form tierod and fastening therefor



S. S. COLT CONCRETE FORM TIEROD AND FASTENING THERE-3 0R Sept. 11, 1934.

Filed Feb. 6, 1932 2 Sheets-Sheet INVENTOR 02m! ga l;

A wi Sept. 11, 1934. s. s. COLT 1,973,609

CONCRETE FORM TIEROD AND FASTENING THEREFOR Filed Feb. 6, 1952 2 Sheets-Sheet 2 IN VENTOR fax/211a! (6Z6 AITORNEY Patented Sept. 11, I934 CONCRETE FORM TIEROD AND FASTENING THEREFOR I Samuel S. Colt, Orange, N. J. Application February 6, 1932, SerialNo; 591,317

8 Claims. '.(o1. 25-431) This invention relates to, improvements in tierods for securing in assembled relation forms for casting concrete structures, and the invention furtherrelates to fastenings for such tie-rods.

It has long been the practice to employ solid tie-rods for extension between the wallsof concrete forms, together with means forfastening such tie-rods relative to the form walls. Great diiiiculty has been experienced, however, in with drawing such tie-rods from the concrete, after the latter has set and preparatory to dismounting the form; this being due to the fact that the tie-rods, being imbedded in the set concrete, would adhere to or bind against the concrete, and would consequently offer great frictional re.- sistance to withdrawing movement.

The present invention has for its principal object to provide a novel form and construction of tie-rod means comprising a multiple of separate and separable sections so assembled and arranged as to offer a minimum of frictional resistance to withdrawal thereof from set concrete. I

This invention has for a further object to provide a specific form of multiple section tie-rod means having a wrapping of paper associated therewith to reduce friction incident to withdraw al thereof from the concrete.

A further object of this invention is to provide means associated with the tie-rods adapted to utilize the same as spreader means for spacing form walls when the tie-rods are secured by their fastening means in assembled relation to the latter.

Other objects of this invention, not at this time more particularly enumerated, will become apparent in the following detailed description oi. the same. r

Illustrative embodiments of this invention are shown in the accompanying drawings, in which: a

Fig. 1 illustrates one form and arrangement of the novel multiple section tie-rod of this invention assembled in holding relation to form walls, and also provided with the means for utilizing the assembled tie-rod as a wall spacing or spreader means; Fig. 2 is a horizontal section of the assembly shown in Fig. 1, taken on line 22 in said Fig. 1; Fig. 3 is a detail transverse section, taken on line 3-3 in Fig. 1, but drawn on an enlarged scale, the same illustrating flone method of applying the paper wrapping to the tierod means; and Fig. 4 is a detail transverse section, taken on line 44 in Fig. 1, and also drawn on an enlarged scale. p v V Fig. 5 is an enlarged fragmentaryside elevation of the novel tie-rod means, showing a modified arrangement of paper wrapping applied thereto; and Fig. 6 is a transverse section, taken on line 6- 6 in Fig. 5. V

, Fig. 6 is a transverse section, similar toflthat of Fig. 6, but showing another modified arrangement of paper wrapping as associated with the multiple section tie-rod means.

Fig. 7 is a'fragmentary side elevation of another modified form of multiple section tie-rod means according to this invention; and Fig. 8 is a transverse section thereof, taken on line 8-8 in Fig. 7. v N

Fig. 9 isanother fragmentary side elevation showing a further modified form and arrangement of multiple section tie-rod means; and Fig, I0 is a transverse section thereof, taken on line l0--10 in Fig. 9. g

7 Similar characters of reference are employed in the above described views, to indicate corresponding parts.

Referring to the drawings, the use of the novel tie-rod means and fastening devices therefor are shown in connection with a common type of concrete wall form, although it will be understood that the same is applicable to many other specific types of forms. The wall form shown comprises, laterally spaced side members 11 provided with the usual externally applied battens 12. The sidemembers 11 and battens 12 are respectively provided with the holes or perforations l3 and 14 through which may project the ends of the tierod means, to which ends the fastening devices are applied; a

In the arrangement shown in Figs. 1 to 4 inclusive, the novel multiple section tie-rod 'means comprises a pair of half round rod sections 15 and 16 disposed with their flat faces mutually opposed. Such two piece form of tie-rod means is preferable for most uses, but it will nevertheless be understood that thetiewod means may be made up of more than two sections, if desired. One of the tie-rod sections, as 15, is provided intermediate'itsends with an enveloping wrapping of flexible sheet material 17, the longitudinal marginal portions 18 and 19 are preferably overlapped oneupon the other so as to overlie the flat face of the-section 15, and so as to be interposed between the opposed fiat faces of the sections l5and 16 when operatively assembled together, Sheet paper'has been found to afford a very satisfactory sheet material for the wrapping, although any other flexible material may be employed if desired. The lapped marginal portions 18-19 of the Wrapping serves to space slightly apart the intermediate portion of the multiple section tie-rod, whereby the end portions of the latter taper somewhat toward their extremities, which emerge from the form interior, so as to project exteriorly beyond the'side members 11 and through the battens 12.

Suitable fastening devices are engaged with the exteriorly projecting ends ofthe'tie rod means. Preferably the fastening devices comprise a wedge abutment block 20 having a longitudinal or axial opening 21 therethrough, and being further provided, adjacent to its outer end, with an internally threaded laterally projecting boss-22 to receive.

a set-screw 23. Provided at theinner endof said wedge abutment block 20 are laterally ofi-set forwardly projecting wings 24 having'inwardly projecting keeper lugs 25.at their free ends. A wedge member 26 is arranged'forlongitudinal vertical movement between the wings 24 and against the end of said abutment block 20. This wedge member is provided with alongitudinal through slot 27 which registers with the opening 21 of the abutment block 20, whereby a projecting end portion of the tie-rodmeans may extend through these parts. The wedge" member is also provided along its inclined rearward face with marginal flanges 28 which 'engage" beneath the keeper lugs 25, thus'retaining the wedge and-block in assembled relation, subject to the operative movement of thewedge 'rela tive to the=block. When the wedge and block are mounted over and upon a projecting end portion of *the tie-rod means, and the wedge, as raised, having its vertical face abutting the batten 12, the set-screw 23 is screwed home to lock the block immovably upon the tie-rod means, whereupon-the wedge may be driven downward to bring home and hold the side members 11 in operative set up relation to the form of which they provide necessary parts.

In order to permit the tie-rod means to also function as spreader means for spacing the side members 11 and holding the same against inward displacement preparatory to pasting concrete therein, tiltable rod gripping stop elements are arranged upon the rod ends. These tiltable stop elements comprise a gripping plate 29 having an opening 30 in its body through which the tie-rod means may extend, and said opening 30 having, at its upper and lower edges, gripping portions 31 adapted to grip the tie-rod means when the plate is canted or tilted to operative position, thus'rendering the plate immovable relative to the tierod means. Extending from the upper 'end of said gripping plate 29, and preferably integrally formed therewith, is an angular ei it ensio nor arm 32. If desired, side websi33' may be provided between the plate and extension or arm adapted to prevent poured concrete from entering beneath and within the angle of theseparts. When assenibling the tie-rod means with the form, the

, grippingportions 31 bind upoiithetie-rod means to immovably lock the stop, elements thereto so as to resist and stop any inward displacement of the side members of the form, and consequently the latter are held immovably spread or laterally spaced apart at desired distance Y After the form hasbeen assembled and locked loosened and withdrawn.

the other.

up in the manner above indicated, and the concrete has been poured thereinto and set, the form may be dismantled by removing the wedge and block fastenings from the ends of the tie-rod means, and the side members 11 and battens 12 thereupon may be removed from the concrete structure. This having been done, the tie-rod means are exposed for withdrawal from the structure. If the tiltable rod gripping stop elements have been used, the same will be exposed at the surface of the concrete, and are first removed by chipping out the same, so that they may be 7 The next step will thereupon be to withdraw the tie-rod means.

Owing to the multiple section structure of the tie-rod means, this may easily be done by driving or pulling. one section longitudinally relative to Because of the paper wrapping, the section 15 may be easily so driven or pulled, since the paper provides a surface against which the rod section may move with a minimum of frictional resistance, both with relationto the surrounding concrete mass as well as with relation'to the other section 16. Once one section is thus removed, the remaining section may be quickly and easily removed, as will be obvious.

In'Fig. 3 Ihave shown but one section of the tie-rod means provided with the wrapping; in

a modified arrangement, however, as shown in Figs. 5 and 6, both sections 1516 of the tie-rod means may be enveloped in the wrapping, preferably by inserting a marginal portion 34 of the wrapping between the rod sections and then Winding the remainder of the wrappingabout both rod sections to form a complete encircling wrapping 35. It is not absolutely essential to insert a lap of the wrapping material between the rod sections, for the latter may be merely enveloped in an externally encircling wrapping out the wrapping of flexible material such as paper. ,When the multiple section tie-rod is employed without the wrapping, it' is preferable that the rod sections be slightly outwardly bowed With respect one to another. Such bowing renders the rod sections somewhat laterally yieldable. This is of advantage, since when concrete is poured into the form and around the tie-rod means, the concrete tends to shrink or contract somewhat so that, in caseswhere solid one-piece rods are used a very strong frictional binding i of the set concrete relative to the surfaces of the rod occurs. When using the multiple section tie-rod of this invention, and especially when the sections are somewhat bowed as above mentioned, the rod sections will yield to the shrinkage or contraction of the concrete, and consequently the objectionable strong frictional binding effect referred to will not occur, and the rod sections may be easily and quickly withdrawn from the set concrete. Even where the wrapping is interposed. between the rod sections, such yielding efiect is still obtained, since the wrapping material is per se comparatively soft and more or less compressible".

, In'FigsI '7 to 10, inclusive, I have shown an arrangement of multiple section tie-rod without wrapping, but having'the bowed formabove referred to. In Figs. '7 and 8, I have alsoindicated that one or more of the ma sectionsv may be provided on their meeting faces with smallprotuberances, as 3'7, which serve as initial spacing means for spacing the rod sections somewhat apart in the desired bowed relation. These protuberances are made by up-setting the rod material at the desired surface upon which the same are to be provided. Such up-setting may be produced by a nail punch or any other suitable tool. When removing a multiple section tie-rod means, having such protuberance, by driving or pulling one rod section relative to the other, the protuberance will be quickly smoothed down or leveled by the relative movement of the sections one against another, and will offer but negligible resistance to the movement of the manipulated rod section.

In Figs. 9 and 10 I have shown the arrangement of multiple section tie-rod means without wrapping but having the preferable bowed form, and in connection therewith I have shown a retaining ring 38 which initially holds the rod sections together in operative assembled relation. It will be obvious, that after the concrete has set about the rod sections, the ring 38 will be imbedded therein, and that consequently the rod sections may be easily driven or pulled away from and out of the concrete.

I am aware that variations, other than those already mentioned, may be made in the above described constructions and many widely different embodiments of this invention could be made without departing from the scope thereof; it is intended, therefore, that all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim:

1. In apparatus of the kind described, a tierod means comprising a plurality of separable sections assembled in registered and aligned single rod forming relation, one or more of said sections being longitudinally bowed to somewhat space the sections apart intermediate their ends, and a wrapping of sheet material enveloping one or more of said sections intermediate the ends thereof.

2. In apparatus of the kind described, a tierod means comprising a pair of half-round sections assembled in registered and aligned single rod forming relation and with their fiat faces opposed one to the other, said sections being outwardly bowed to slightly space apart intermediate portions of their opposed flat faces, thereby to reduce friction therebetween when said sections are relatively moved longitudinally.

3. In apparatus of the kind described, a tierod means comprising a pair of half-round sections arranged with their fiat faces toward one another, and a wrapping of paper around at least one of said sections intermediate its ends.

4. In apparatus of the kind described, a tierod means comprising a pair of half-round sections arranged with their flat faces in opposition, a wrapping of paper to envelope said sections intermediate their ends, said wrapping having a portion thereof disposed between the opposed flat faces of said sections.

5. In apparatus for assembling a form including spaced side members, a tie-rod means extending through and between said side members, a gripping element having an opening therethrough to pass said tie-rod means and having an angular extension at one end to abut the inside face of a side member whereby inward moving pressure exerted upon the latter tilts said gripping element into immovable bound relation to said tie-rod means to thereby hold said side member against inward displacement, and means engaged with the portion of said tie-rod means exteriorly projecting from said side member to press and hold the latter toward and into engagement with said angular extension of said gripping element.

6. In apparatus for assembling a form including spaced side members, a tie-rod means extending through and between said side members, a gripping element having an opening therethrough to pass said tie-rod means and having an angular extension at one end to abut the inside face of a side member whereby inward moving pressure exerted upon the latter tilts said gripping element into immovable bound relation to said tierod means to thereby hold said side member against inward displacement, and means engaged with the portion of said tie-rod means exteriorly projecting from said side member to press and hold the latter toward and into engagement with said angular extension of said gripping element, said latter means comprising an abutment block fixed on said tie-rod means and a wedge member movable between said abutment block and said side member.

'7. In apparatus for assembling a form including spaced side members, a tie-rod means comprising a plurality of separable sections assembled in registered and aligned rod forming relation, said tie-rod means extending through and between said side members, a gripping element having an opening therethrough to pass said tierod means and having an angular extension at one end to abut the inside face of a side member whereby inward moving pressure exerted upon the latter tilts said gripping element into immovable bound relation to said tie-rod means to thereby hold said side member against inward displacement, and means engaged with the portion of said tie-rod means exteriorly projecting from said side member to press and hold the latter toward and into engagement with said angular extension of said gripping element.

8. In apparatus for assembling a form including spaced side members, a tie-rod means comprising a plurality of separable sections assembled in registered and aligned rod forming relation, said tie-rod means extending through and between said side members, a gripping element having an opening therethrough to pass said tierod means and having an angular extension at a one end to abut the inside face of a side member whereby inward moving pressure exerted upon the latter tilts said gripping element into immovable bound relation to said tie-rod means to thereby hold saidv side member against inward displacement, and means engaged with the portion of said tie-rod means exteriorly projecting from said side member to press and hold the latter toward and into engagement with said angular extension of said gripping element, said 

